Added Sri Lanka holidays

Makefile

@@ -69,4 +69,4 @@ test:
 	pytest --cov=. --cov-config=pyproject.toml --cov-report term --cov-report xml --durations 10 --durations-min=0.75 --dist loadscope --no-cov-on-fail --numprocesses auto
 
 tox:
-	tox --parallel auto
+	tox --parallel auto

README.rst

@@ -146,7 +146,7 @@ Available Countries
 .. _ISO 639-1 code: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
 .. _ISO 639-2 code: https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
 
-We currently support 156 country codes. The standard way to refer to a country
+We currently support 157 country codes. The standard way to refer to a country
 is by using its `ISO 3166-1 alpha-2 code`_, the same used for domain names, and
 for a subdivision its `ISO 3166-2 code`_. Some countries have common or foreign
 names or abbreviations as aliases for their subdivisions. These are defined in
@@ -845,6 +845,11 @@ All other default values are highlighted with bold:
      - Autonomous communities: AN, AR, AS, CB, CE, CL, CM, CN, CT, EX, GA, IB, MC, MD, ML, NC, PV, RI, VC
      - en_US, **es**, uk
      -
+   * - Sri Lanka
+     - LK
+     -
+     - en_US, **si_LK**, ta_LK
+     - BANK
    * - Sweden
      - SE
      -

holidays/countries/__init__.py

@@ -145,6 +145,7 @@
 from .south_africa import SouthAfrica, ZA, ZAF
 from .south_korea import SouthKorea, KR, KOR, Korea
 from .spain import Spain, ES, ESP
+from .sri_lanka import SriLanka, LK, LKA
 from .sweden import Sweden, SE, SWE
 from .switzerland import Switzerland, CH, CHE
 from .taiwan import Taiwan, TW, TWN

holidays/countries/sri_lanka.py

@@ -0,0 +1,354 @@
+#  holidays
+#  --------
+#  A fast, efficient Python library for generating country, province and state
+#  specific sets of holidays on the fly. It aims to make determining whether a
+#  specific date is a holiday as fast and flexible as possible.
+#
+#  Authors: Vacanza Team and individual contributors (see AUTHORS file)
+#           dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023
+#           ryanss <ryanssdev@icloud.com> (c) 2014-2017
+#  Website: https://github.com/vacanza/holidays
+#  License: MIT (see LICENSE file)
+
+from gettext import gettext as tr
+
+from holidays.calendars import (
+    _CustomBuddhistHolidays,
+    _CustomIslamicHolidays,
+    _CustomHinduHolidays,
+)
+from holidays.calendars.gregorian import JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC
+from holidays.constants import BANK, PUBLIC
+from holidays.groups import (
+    InternationalHolidays,
+    IslamicHolidays,
+    ChristianHolidays,
+    HinduCalendarHolidays,
+    BuddhistCalendarHolidays,
+    StaticHolidays,
+)
+from holidays.holiday_base import HolidayBase
+
+
+class SriLanka(
+    HolidayBase,
+    InternationalHolidays,
+    IslamicHolidays,
+    ChristianHolidays,
+    HinduCalendarHolidays,
+    BuddhistCalendarHolidays,
+    StaticHolidays,
+):
+    """
+    https://en.wikipedia.org/wiki/Culture_of_Sri_Lanka#List_of_holidays
+    https://www.timeanddate.com/holidays/sri-lanka/
+    https://factsanddetails.com/south-asia/Srilanka/People_Srilanka/entry-7978.html
+    https://help.wendywutours.com.au/knowledge/public-holidays-and-festivals-sri-lanka
+
+    """
+
+    country = "LK"
+    supported_categories = (BANK, PUBLIC)
+    default_language = "si_LK"
+    # %s (estimated).
+    estimated_label = tr("%s (අනුමානිත)")
+    supported_languages = ("en_US", "si_LK", "ta_LK")
+    # Sri Lanka's regaining of full independence from British influence.
+    start_year = 1948
+
+    def __init__(self, *args, **kwargs):
+        InternationalHolidays.__init__(self)
+        IslamicHolidays.__init__(self, SriLankaIslamicHolidays)
+        ChristianHolidays.__init__(self)
+        HinduCalendarHolidays.__init__(self)
+        BuddhistCalendarHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=SriLankaStaticHolidays)
+        super().__init__(*args, **kwargs)
+
+    def _populate_public_holidays(self):
+        # Independence Day.
+        self._add_holiday_feb_4(tr("ස්වාධීනත්ව දිනය"))
+
+        if self._year >= 1949:
+            # Thai Pongal.
+            self._add_holiday_jan_14(tr("தைப்பொங்கல்"))
+
+        # Deepavali.
+        self._add_diwali(tr("දීපාවලී"))
+
+        # Day before Sinhala and Tamil New Year.
+        self._add_holiday_apr_13(tr("සිංහල හා දෙමළ අලුත් අවුරුද්දට පෙර දිනය"))
+
+        # Sinhala and Tamil New Year.
+        self._add_holiday_apr_14(tr("සිංහල සහ දෙමළ නව වසර"))
+
+        # Vesak Poya.
+        self._add_vesak_may(tr("වෙසක් පොහොය"))
+
+        # Poson Poya.
+        self._add_holiday_jun_1(tr("පොසොන් පොහොය"))
+
+        # Esala Poya.
+        self._add_holiday_jul_1(tr("එසාල පොය"))
+
+        # Duruthu Poya.
+        self._add_holiday_jan_1(tr("දුරුතු පොය"))
+
+        # Christmas.
+        self._add_christmas_day(tr("ක්‍රිස්මස්"))
+
+        #  The Prophet's Birthday.
+        self._add_mawlid_day(tr("නබිගේ උපන් දිනය"))
+
+        # Good Friday
+        self._add_good_friday(tr("හොඳ සිකුරාදා"))
+
+        # Eid al-Fitr.
+        name = tr("ඊද් අල්-ෆිතර්")
+        self._add_eid_al_fitr_day(name)
+        self._add_eid_al_fitr_day_two(name)
+        self._add_eid_al_fitr_day_three(name)
+
+        # Eid al-Adha.
+        name = tr("ඊද් අල්-අදා")
+        self._add_eid_al_adha_day(name)
+        self._add_eid_al_adha_day_two(name)
+        self._add_eid_al_adha_day_three(name)
+
+    def _populate_bank_holidays(self):
+        # Bank Holidays
+        self._add_holiday_jun_30(tr("බැංකු නිවාඩු"))
+
+        # New Year's Eve
+        self._add_new_years_eve(tr("අලුත් අවුරුදු උදාව"))
+
+        if self._year >= 1956:
+            # Labor Day
+            self._add_labor_day(tr("කම්කරු දිනය"))
+
+
+class LK(SriLanka):
+    pass
+
+
+class LKA(SriLanka):
+    pass
+
+
+class SriLankaIslamicHolidays(_CustomIslamicHolidays):
+    EID_AL_ADHA_DATES = {
+        2014: (OCT, 5),
+        2015: (SEP, 23),
+        2016: (SEP, 13),
+        2017: (SEP, 2),
+        2018: (AUG, 22),
+        2019: (AUG, 11),
+        2020: (JUL, 31),
+        2021: (JUL, 20),
+        2022: (JUL, 9),
+        2023: (JUN, 28),
+        2024: (JUN, 17),
+    }
+
+    EID_AL_FITR_DATES = {
+        2014: (JUL, 29),
+        2015: (JUL, 18),
+        2016: (JUL, 7),
+        2017: (JUN, 26),
+        2018: (JUN, 15),
+        2019: (JUN, 4),
+        2020: (MAY, 24),
+        2021: (MAY, 13),
+        2022: (MAY, 1),
+        2023: (APR, 22),
+        2024: (APR, 10),
+    }
+
+    MAWLID_DATES = {
+        2014: (JAN, 14),
+        2015: ((JAN, 3), (DEC, 24)),
+        2016: (DEC, 12),
+        2017: (DEC, 1),
+        2018: (NOV, 21),
+        2019: (NOV, 10),
+        2020: (OCT, 29),
+        2021: (OCT, 19),
+        2022: (OCT, 8),
+        2023: (SEP, 27),
+        2024: (SEP, 16),
+    }
+
+
+class SriLankaBuddhistHolidays(_CustomBuddhistHolidays):
+    VESAK_DATES = {
+        2001: (MAY, 7),
+        2002: (MAY, 26),
+        2003: (MAY, 15),
+        2004: (JUN, 2),
+        2005: (MAY, 22),
+        2006: (MAY, 12),
+        2007: (MAY, 31),
+        2008: (MAY, 19),
+        2009: (MAY, 9),
+        2010: (MAY, 28),
+        2011: (MAY, 17),
+        2012: (MAY, 5),
+        2013: (MAY, 24),
+        2014: (MAY, 13),
+        2015: (JUN, 1),
+        2016: (MAY, 21),
+        2017: (MAY, 10),
+        2018: (MAY, 29),
+        2019: (MAY, 19),
+        2020: (MAY, 7),
+        2021: (MAY, 26),
+        2022: (MAY, 15),
+        2023: (JUN, 2),
+        2024: (MAY, 22),
+        2025: (MAY, 12),
+    }
+
+
+class SriLankaHinduHolidays(_CustomHinduHolidays):
+    # Deepavali
+    DIWALI_DATES = {
+        2001: (NOV, 14),
+        2002: (NOV, 3),
+        2003: (OCT, 23),
+        2004: (NOV, 11),
+        2005: (NOV, 1),
+        2006: (OCT, 21),
+        2007: (NOV, 8),
+        2008: (OCT, 27),
+        2009: (NOV, 15),
+        2010: (NOV, 5),
+        2011: (OCT, 26),
+        2012: (NOV, 13),
+        2013: (NOV, 2),
+        2014: (OCT, 22),
+        2015: (NOV, 10),
+        2016: (OCT, 29),
+        2017: (OCT, 18),
+        2018: (NOV, 6),
+        2019: (OCT, 27),
+        2020: (NOV, 14),
+        2021: (NOV, 4),
+        2022: (OCT, 24),
+        2023: (NOV, 12),
+        2024: (OCT, 31),
+        2025: (OCT, 20),
+    }
+
+
+class SriLankaStaticHolidays:
+    """
+    This class contains the static holiday dates for Sri Lanka.
+    """
+
+    # Magh Puja.
+    magh_puja_name = tr("මාඝ පූජා")
+    # Maha Shivatri.
+    maha_shivratri_name = tr("මහා ශිවාත්‍රි")
+    # Nikini Poya.
+    nikini_poya_name = tr("නිකිනි පොය")
+    # Binara Poya.
+    binara_poya_name = tr("බිනර පොය")
+    # Wap Poya.
+    wap_poya_name = tr("වප් පොය")
+    # Il Poya.
+    il_poya_name = tr("ඉල් පොය")
+    # Unduwap Poya.
+    unduwap_poya_name = tr("උඳුවාප් පොය")
+
+    special_public_holidays = {
+        2014: (
+            (AUG, 10, nikini_poya_name),
+            (OCT, 8, wap_poya_name),
+        ),
+        2015: (
+            (AUG, 29, nikini_poya_name),
+            (SEP, 28, il_poya_name),
+            (OCT, 27, wap_poya_name),
+        ),
+        2016: (
+            (AUG, 17, nikini_poya_name),
+            (SEP, 16, binara_poya_name),
+            (OCT, 15, wap_poya_name),
+        ),
+        2017: (
+            (AUG, 7, nikini_poya_name),
+            (SEP, 5, binara_poya_name),
+            (OCT, 5, il_poya_name),
+        ),
+        2018: (
+            (AUG, 25, nikini_poya_name),
+            (SEP, 24, binara_poya_name),
+            (OCT, 24, wap_poya_name),
+        ),
+        2019: (
+            (AUG, 14, nikini_poya_name),
+            (SEP, 13, binara_poya_name),
+            (OCT, 13, wap_poya_name),
+            (SEP, 14, il_poya_name),
+        ),
+        2020: (
+            (AUG, 3, nikini_poya_name),
+            (SEP, 1, binara_poya_name),
+            (OCT, 30, wap_poya_name),
+            (OCT, 1, il_poya_name),
+            (DEC, 29, unduwap_poya_name),
+        ),
+        2021: (
+            (MAR, 11, maha_shivratri_name),
+            (AUG, 22, nikini_poya_name),
+            (SEP, 20, binara_poya_name),
+            (OCT, 20, wap_poya_name),
+            (OCT, 20, il_poya_name),
+            (DEC, 18, unduwap_poya_name),
+        ),
+        2022: (
+            (FEB, 16, magh_puja_name),
+            (MAR, 1, maha_shivratri_name),
+            (AUG, 11, nikini_poya_name),
+            (SEP, 10, binara_poya_name),
+            (OCT, 9, wap_poya_name),
+            (DEC, 7, unduwap_poya_name),
+        ),
+        2023: (
+            (MAR, 6, magh_puja_name),
+            (FEB, 18, maha_shivratri_name),
+            (AUG, 30, nikini_poya_name),
+            (SEP, 29, binara_poya_name),
+            (OCT, 28, wap_poya_name),
+            (NOV, 27, il_poya_name),
+            (DEC, 26, unduwap_poya_name),
+        ),
+        2024: (
+            (FEB, 24, magh_puja_name),
+            (MAR, 8, maha_shivratri_name),
+            (AUG, 19, nikini_poya_name),
+            (SEP, 17, binara_poya_name),
+            (OCT, 17, wap_poya_name),
+            (NOV, 15, il_poya_name),
+            (DEC, 14, unduwap_poya_name),
+        ),
+        2025: (
+            (FEB, 12, magh_puja_name),
+            (FEB, 26, maha_shivratri_name),
+            (AUG, 8, nikini_poya_name),
+            (SEP, 7, binara_poya_name),
+            (OCT, 6, wap_poya_name),
+            (NOV, 3, il_poya_name),
+            (DEC, 4, unduwap_poya_name),
+        ),
+        2026: (
+            (MAR, 3, magh_puja_name),
+            (FEB, 15, maha_shivratri_name),
+            (OCT, 15, il_poya_name),
+            (DEC, 29, unduwap_poya_name),
+        ),
+        2027: (MAR, 6, maha_shivratri_name),
+        2028: (FEB, 23, maha_shivratri_name),
+        2029: (FEB, 11, maha_shivratri_name),
+        2030: (MAR, 2, maha_shivratri_name),
+    }